The article and the embedded video do not make it entirely clear but if this technology could be deployed in existing Wi-Fi routers with relative ease [1] then it could have far-going implications for both privacy and the physical security of anywhere where there's Wi-Fi. Once it's easy enough to deploy on a hacked device that a hired script kiddie can do it even simple burglars could take an interest in residential routers to know when nobody's home.

I wonder if this will affect the market for embedded Linux security consulting in a major way.

[1] I.e., without modifying the hardware and with no need for manual calibration.